US Open Tennis: US Open tennis official pleads not guilty in husband's murder

Novak Djokovic, Serena Williams and Andy Roddick headline the second day of the 2012 U.S. Open.It's no secret that 2012 has been the year of renaissance for the world No. 1-ranked tennis player, Roger Federer. After years atop the perch as the unquestioned best player in the world, the 31-year-old Federer came into this season ranked thirdOver the first two days of the US Open, the world's largest tennis stadium turned into the world's biggest bore.Players like Novak Djokovic and

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